Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie o país com polák.
 ###Tabelas: CREATE TABLE academic_staff (academic_staff_id AUTO_INCREMENT PRIMARY KEY, Lecturers INT, Associate professors INT, Assistant professors INT, Professors INT, Total INT) CREATE TABLE past_champions_and_grand_finalists (past_champions_and_grand_finalists_id AUTO_INCREMENT PRIMARY KEY, Year INT, Champion VARCHAR, Grand Finalist VARCHAR, Champion Team Members VARCHAR, Grand Finalists VARCHAR) CREATE TABLE players_in (players_in_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Country VARCHAR, Type VARCHAR, Moving from VARCHAR, Transfer window VARCHAR, Transfer fee VARCHAR) CREATE TABLE high-prominence_peaks (high-prominence_peaks_id AUTO_INCREMENT PRIMARY KEY, Mountain/Peak VARCHAR, Height (metres) INT, Prominence (metres) INT, Height (feet) INT, Prominence (feet) INT) CREATE TABLE triconsonantal_roots (triconsonantal_roots_id AUTO_INCREMENT PRIMARY KEY, Semitological abbreviation VARCHAR, Hebrew name VARCHAR, Arabic name VARCHAR, Morphological category VARCHAR, Hebrew Form VARCHAR, Arabic form VARCHAR, Approximate translation VARCHAR)  
SELECT Country FROM players_in WHERE Name = polák